Venue: Telekom Center Athens
Town: Marousi, GR
Capacity: 17,600

Telekom Center Athens, also dubbed T-Center Athens, and previously known as OAKA Basketball Arena, is part of the Spyros Louis Olympic Athletic Center of Athens (Greek: O.A.K.A. «Σπύρος Λούης»). It was completed in 1994 and is the largest indoor venue in Greece. It was used for sporting events at the 2004 Summer Olympics. The venue is located in Marousi, a northern suburb of Athens. During its construction, it was considered to be one of the biggest and most modern indoor sports arenas in all of Europe. The 19,000-capacity arena is accompanied by an adjacent training facility, and a parking lot. In 2023, Panathinaikos B.C. signed an agreement with the Greek state for a 49-year concession of the asset, making the club the sole tenant and binding it to invest in the renovation of the asset's infrastructure. The club has since transferred the responsibility of managing the venue to White Veil S.A., a company which specializes in venue and facilities management, and is also owned by Dimitris Giannakopoulos. In August 2025, a 5-year deal between White Veil S.A. and Cosmote Telekom-OTE (the greek subsidiary of Deutsche Telekom A.G.) was officially announced, for the rebranding of the entire venue as Telekom Center Athens. The Olympic Indoor Hall is notable for its distinctive A-frame roof that features four huge pillars, each of which is 35 meters tall, that stand 108 meters apart from each other. According to the Greek Ministry of Sports, it is the largest indoor sporting arena of its kind in the world. The arena is also constructed in a unique way so that an abundant amount of natural light comes into the arena during the day. The arena seats up to 17,600 for gymnastics events, although only 12,500 seats were made publicly available for the gymnastics competition at the 2004 Olympics. It seats up to 19,443 for basketball games, which includes 300 seats for media members, and 189 seats for VIPs. A large scale arena renovation was completed in 2004, for the 2004 Summer Ol